you also might be focusing/working at comfort way too early.. you didn't really clarify when you were trying to build comfort and from the sounds of it it sounds like you're trying to incorporate it way early. comfort always comes later.. at first you should be working on rapport and attraction, once those are mastered then you can start giving her a reason to trust/feel comfortable with you (trust = comfort)
also, comfort is definitely something to be eased into, not an instant flip of a switch type thing. it CAN happen quickly, and actually it usually does if you're really vibing with a girl as you should be (in terms of, for example, your first day2 together), but it should never be forced or rushed. just be a genuine guy, let her see your legitimacy. it should come naturally. if it doesn't, you need to build more rapport and attraction.
rapport + attraction = comfort
oh, and, to re-quote blondguy.. yeah, once that comfort is there, you'll KNOW. you won't have to question it, it'll feel right. then proceed with the shit-fucking.
